How do I notify additional people when I create issues or comments?

Yes. You can mention somebody's username in a comment with the @ symbol, kind of like Twitter. We'll send that user a one-time notification that lets them know you mentioned them, and they'll be able to comment or follow the issue to receive future updates. It's worth noting that mentioning people will only send them a one-time notification unless they choose to comment or follow the issue. Our philosophy is that people should not be able to auto-subscribe others to notifications. For more information, we have a blog post about notifying additional people.

If you type the @ symbol, Sifter will begin searching for matches for users first names, last names, and usernames.